# Relationship history for MSHA mine 3200165

Current hierarchy: **Helm Gene → Helm Brothers Inc → Pit #1**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Helm Brothers Inc → Pit #1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Helm Gene → Pit #1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Helm Gene → Helm Brothers Inc; 1950-01-01 to current/open; source msha-controller-operator-history